Ya know, about that last part of the desc, technically anyone can freely download/screenshot the image you've posted here and set it as thei wallpaper, whether they buy it or not. I don't really feel like doing that personally, but it is an option for anyone. I guess this one is in like, 4:3 format, it's like a square, which doesn't fit perfectly onto rectangular screens, but still... and tablets exsist too!
Anyway, cool drawing again.